Question 19 (Mandatory) (1 point) Darien has collected data on drownings and ice cream sales over the same summer holiday weekend for several years, as shown. Does the data support a correlation between these two variables? Is a cause and effect relationship likely? What advice would you give Darien for further analysis? 12 10 8- IceCream_Sales (thousands) N 6 10 Drownings IceCream_Sales = 1.14e+03Drownings - 4.1e+02; r2 = 0.97Question 20 {Mandatory} (1 point} A mark of at least 50 is required to pass a course. The marks this vear run from a low of 45 to a high of 83, with a mean of 64 and a standard deviation of 5. The professor would like all students to pass, so he adjusts the marks to achieve a mean of ?2 with a standard deviation of 5. Is this enough to ensure that all students will pass? Question 21 {Mandatory} (1 point} A newspaper survey reports that only 23% of the voters in a town favour construction of a new skateboard park. The survey claims an accuracy of 13.2%. 19 times out of 20. How many voters were surveyed